Bit-brace handle



E. W. BULLARD.

BIT BRACE HANDLE.

APPLICATION msn SEPT. 1s. 1920.

1,388,925, mmm. 3o, 1921.

UNITED STATES EDWIN W. BULLARD, OF WHITNEYVILLE, CONNECTICUT, ASSIGNORTO TINCIIIZSTER'` PATENT OFFICE.

REPEATING- .ARMS CO., OF NEW HAVEN, CONNECTICUT, A CORPORATION.

BIT-BRACE HANDLE.

Specification of Letters Patent.

Patented Aug. 30, 1921.

Application` filed September 13, 1920. Serial No. 409,857.

Figure 1. a view in elevation of a bit-brace provided with my improvedhandle.

Fig. 2. an enlarged view of the handle in longitudinal section with thecentral portion of the crank of the bit-brace shown in elevation andbroken away.

Fig. 3. a broken view in transverse section on the line 3-3 of Fig. 2looking downward.

Fig. a. a detached broken view in elevation of the central portion ofthe crank showing its combined raceways and positioning grooves.

Fig. 5. a detached view partly in elevation and partly in section of oneof the two combined bushings and race-ways of the handle.

Fig. 6. a reverse plan view thereof.

Fig. 7. a detached view in elevation of the positioning-sleeve of thehandle, a portion thereof being broken away.

Fig. 8. a reverse plan view thereof.

Fig. 9. a detached view partly in elevation and partly in section of oneof the two ferrules of the handle.

Fig. 10. a reverse plan view thereof.

My invention relates to an improved handle for bit-braces, the objectbeing to provide a simple, durable, and reliable handle of theanti-friction type.

With these ends in View my invention consists in a` bit-brace handlehaving certain details of construction and combinations of parts as willbe hereinafter described and pointed out in the claim.

In carrying out my invention as herein shown, I employ a handle 11provided aty its respective ends with tapering ferrules 12 and combinedbushings and raceways 13 which latter also serve as dust guards for theexclusion of dust from anti-friction rollers 1a which run in combinedcircumferential positioning-grooves and raceways 15 formed in thecentral portion of-the crank 16 on 'which they are separated bysubstantially the length of the handle. The said handle. is held againstlongitudinal movement upon the crank'by means of a positioning-sleeve 17mounted thereupon and having inwardly turned terminal faces 18 whichbear against the inner ends of the rollers 14e and so hold the handleagainst longitudinal movement with respect to the crank, withoutinterfering with the rotary movement thereupon. The outer ends of theparts k13 are flanged and serve to hold the ferrules in place as well asto form a finish vfor the ends of the handle into which the. bushings.are inserted so as to extend inward beyond the ends of the sleeve 17.

I claim:

In a bit-brace, the combination with crank formed with circumferentialcombined raceways and positioning-grooves spaced apart, of a handle, asheet-metal ferrule at each end thereof, a combined raceway 'and bushinginserted within each end of the handle, and having its outer end flaredto engage withk the adjacent ferrule, whereby the same is held in place,anti-friction rollers interposed between the said raceways and bushings,and a single sheet-metal positioning-sleeve located within the handleand turned inward at its respective ends to en* gage with the innerVends of the said rollers, whereby the sleeve co-acts with the saidrollers to hold the said handle against longitudinal displacement.

In testimony whereof, I have signed: this specification in the presenceof two subscrib-y ing witnesses.

EDWIN W. BULLARD. .Witnesses:

ERIK S. PALMER, A. E. HoDGsoN.

